Klemgard Park Footbridge–A Glued Wood Truss Structure

A simple pedestrian bridge of 80-foot span and 4-foot deck width was constructed using 1/4-inch glued finger joints in all shop made truss connections and using field glued and bolted spliced connections to join the three segments delivered to the erection site. Material was No. 2 and better, two-inch Douglas-fir dimension. Trusses were dip treated in penta wood preservative. Deck and bracing were brush treated. All openings were sealed with an elastomeric adhesive. Lateral rigidity was obtained via elastomeric deck to stringer bonds using nail pressure. Deck was coated with Hypalon. Dead load deflection and creep measurements verify design calculations. Purdue Plane Structures Analysis was employed in the design of trusses. Design load was 100 psf. Cost exclusive of footings at 1973 prices was $17 per square foot of deck surface.

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